• Chinese Optics Letters
  • Vol. 21, Issue 3, (2023)
Cheng Peiyun, Han Mengmeng, Du Yueqing, Shu Xuewen
Author Affiliations
  • Northwestern Polytechnical University
  • show less

    Abstract

    We have observed various polarization domains and a giant self-mode-locked pulse in a 130 m long erbium-doped fiber laser without any mode-locking devices. By adjusting the intra-cavity polarization controller, we investigated the evolution process of the polarization domain with the cavity birefringence varying. When the birefringence was close to zero, the polarization domains split into multi-domains, and finally a giant self-mode-locked pulse formed for the first time. We analyzed that the generation of the self-mode-locked pulse was related to the multiple sub-domains ascribed to the strong coherent cross coupling between the orthogonal polarization light components in the long fiber cavity.
    Manuscript Accepted: Sep. 20, 2022
    Posted: Sep. 21, 2022